a_RaspberryPi einrichten

sudo raspi-config
sudo apt-get update
sudo apt-get upgrade
sudo apt-get clean

# pi3 mit WLAN und Bluetooth
# https://community.conrad.de/frage-ansehen/wie-wlan-stick-an-raspberry-pi-an-und-ausschalten
# https://wiki.ubuntuusers.de/rfkill/

sudo apt-get install rfkill

# Uptime daemon installieren
# http://blog.moneybag.de/raspberry-pi-uptimed-wie-lange-ist-euer-rpi-schon-online/

sudo apt-get install uptimed


# fail2ban installieren
# https://waschto.eu/raspberry-im-internet-absichern
# https://www.thomas-krenn.com/de/wiki/SSH_Login_unter_Debian_mit_fail2ban_absichern

sudo apt-get install fail2ban

sudo cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local

sudo nano /etc/fail2ban/jail.local
# bei ssh in port = xxxx ändern

sudo nano /etc/ssh/sshd_config
#	  PermitRootLogin no
# 	Port xxxx
#
# ssh neu starten
# sudo /etc/init.d/sshd restart  (??)

# fail2ban neu starten
sudo /etc/init.d/fail2ban restart


# Automatischer Zeit-Update
# https://dokuwiki.nausch.org/doku.php/centos:ntp-zeitserver
# https://raspberrypi.stackexchange.com/questions/10267/incorrect-time-until-i-restart-the-ntp-server-multiple-times
# http://raspberrypi.tomasgreno.cz/ntp-client-and-server.html

sudo nano /etc/ntp.conf
      server 0.de.pool.ntp.org iburst
      server 1.de.pool.ntp.org iburst
      server 2.de.pool.ntp.org iburst
      server 3.de.pool.ntp.org iburst
      server time.google.com iburst
      server ntp1.t-online.de iburst
      server ntp0.ipv6.fau.de iburst
      server ntp1.ipv6.fau.de iburst

sudo nano /etc/systemd/timesyncd.conf
      #Servers=192.168.0.1 ...

sudo timedatectl set-ntp true

timedatectl status

# ntpd neu starten
sudo /etc/init.d/ntp restart

# den ntp checken

watch ntpq -np